M4

Markerposts are meant to start at one end of a road and count the kilometres to the other. But things are never that simple.

Serving Reading, Bristol and South Wales, the A4 and M4 are one of London's most important approaches. But the wildest fantasies of the sixties couldn't overcome its trickier problems.

A new set of Ringways pages are now online, looking at unbuilt motorways and road projects west of London.

The UK's first four-level interchange opened in 1966. Relive some of the wonder and excitement of this icon of the motorway era with the book published to mark its completion.

In the sixties, a motorway was built on Hyde Park. Which one?

Bristol’s M32 recently gained a new junction for buses only. To mark this strange new addition to the motorway network, here are five places you can’t leave the motorway.

Today two motorways cross the Severn near Chepstow. But as recently as 1965, the only crossing was a ferry that carried six cars at a time, from Aust to Beachley.

A gallery of images sent in by visitors to the site of original photos of motorways — including some impressive views of the M4 and M11 under construction.

One man's account of the building of the M4 through Wales, seen as he grew up in Swansea and witnessed it stage by stage - a tour of the motorway from its construction to the present day.